Acquired Card Receivables - Summary of Change in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Allowance For Credit Losses [Roll Forward]
Balance, beginning	$ 15,498	$ 5,414
Initial allowance for credit losses on purchased card receivables with credit deterioration	0	10
Provision for expected credit losses	11,975	6,583
Charge-off amounts	(9,791)	(5,033)
Recoveries collected	831	567
Balance, end of period	$ 18,513	$ 7,541